Perhaps you should try some spelling variations:
"cong thuc thep slippers" » "cong tac thep slippers", "cong thuoc theo slippers", "cong thuc thuc slippers", "cong thuc thai slippers", "cong thuc thep slippery", "cong thuc thep grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong thuc thep slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong thuc thep slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong thuc thep slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong thuc thep slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.